<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>02 offsetWidth和offsetHeight</title>
    <style type="text/css">
        #box{
            width: 200px;
            height: 200px;
            border: 1px solid #000;
            background-color: red;
            padding-left: 10px;
            padding-right: 20px;
            margin: 10px;
        }
    </style>
</head>
<body>
    <div id="box" style="width:100px;height: 100px;"></div>
    <script type="text/javascript">
        // offsetWidth = width + border-left-width + border-right-width + 
        var box = document.getElementById('box');
        console.log(box.offsetWidth,box.offsetHeight);
        // 只能获取行内的属性
        console.log(box.style.width,box.style.height);
        // 因为offsetWidth和offsetHeight 它们是只读
        box.offsetWidth = 500;
        box.style.width = 500 + 'px';
    </script>
</body>
</html>